Erratum: Measures of electronic-vibrational entanglement and quantum coherence in a molecular system [Phys. Rev. A<b>92</b>, 042323 (2015)]

Vatasescu, Mihaela

doi:10.1103/physreva.93.069906

Cited by 6 publications

(12 citation statements)

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“…We begin by describing the theoretical model of a diatomic molecule driven by a coupling between electronic states, such that several electronic states could be populated. The intramolecular dynamics of such a molecule is characterized by electronic-vibrational entanglement and electronic coherence [58,59]. Subsequently, we will deduce the canonical form of the master equation for a 2-dimensional electronic subsystem, building the non-Markovianity measures from the canonical decoherence rates.…”

Section: Non-markovianity In the Reduced Time Evolution Of The Ementioning

confidence: 99%

“…A detailed description of the molecular model can be found in previous papers [58,59], where we have analyzed entanglement and coherence of pure states |Ψ el,vib (t) > created by laser pulses. The molecular state |Ψ el,vib (t) > has the form…”

Section: Non-markovianity In the Reduced Time Evolution Of The Ementioning

confidence: 99%

“…ρ el (t) describes an electronic subsystem which is entangled with the vibrational environment [58]. For N el populated states, the linear entropy L(t) = 1 − Tr el (ρ 2 el (t)) of the electronic-vibrational entanglement has the expression [59]:…”

Section: A the Electronic Subsystem As An Open Quantum System Entangmentioning

confidence: 99%

“…Besides the l 1 norm measure of the electronic coherence, C l1 (ρ el ), we shall use the Wigner-Yanase skew information I S (ρ el ,Ĥ el )= − 1 2 Tr el [ √ρ el ,Ĥ el ] 2 for the electronic stateρ el , with respect to the electronic Hamilto-nianĤ el , to additionally characterize electronic subsystem coherence [59]. The skew information I S is a measure of coherence as asymmetry relative to a group of translations [64][65][66], quantifying the coherence of a state with respect to a certain Hamiltonian eigenbasis.…”

Section: Connecting Non-markovianity Of the Electronic Evolution mentioning

confidence: 99%

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Non-Markovian dynamics of the electronic subsystem in a laser-driven molecule: Characterization and connections with electronic-vibrational entanglement and electronic coherence

Vatasescu

2018

Phys. Rev. A

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Non-Markovian quantum evolution of the electronic subsystem in a laser-driven molecule is characterized through the appearance of negative decoherence rates in the canonical form of the electronic master equation. For a driven molecular system described in a bipartite Hilbert space H=H el H vib of dimension 2 × Nv, we derive the canonical form of the electronic master equation, deducing the canonical measures of non-Markovianity and the Bloch volume of accessible states. We find that one of the decoherence rates is always negative, accounting for the inherent non-Markovian character of the electronic evolution in the vibrational environment. Enhanced non-Markovian behavior, characterized by two negative decoherence rates, appears if there is a coupling between the electronic states g, e, such that the evolution of the electronic populations obeys d(PgPe)/dt > 0. Non-Markovianity of the electronic evolution is analyzed in relation to temporal behaviors of the electronic-vibrational entanglement and electronic coherence, showing that enhanced non-Markovian behavior accompanies entanglement increase. Taking as an example the coupling of two electronic states by a laser pulse in the Cs2 molecule, we analyze non-Markovian dynamics under laser pulses of various strengths, finding that the weaker pulse stimulates the bigger amount of non-Markovianity. Our results show that increase of the electronic-vibrational entanglement over a time interval is correlated to the growth of the total amount of non-Markovianity calculated over the same interval using canonical measures, and connected with the increase of the Bloch volume. After the pulse, non-Markovian behavior is correlated to electronic coherence, such that vibrational motion in the electronic potentials which diminishes the nuclear overlap, implicitly increasing the linear entropy of entanglement, brings a memory character to dynamics.

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Section: Non-markovianity In the Reduced Time Evolution Of The Ementioning

confidence: 99%

Section: Non-markovianity In the Reduced Time Evolution Of The Ementioning

confidence: 99%

Section: A the Electronic Subsystem As An Open Quantum System Entangmentioning

confidence: 99%

Section: Connecting Non-markovianity Of the Electronic Evolution mentioning

confidence: 99%

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Non-Markovian dynamics of the electronic subsystem in a laser-driven molecule: Characterization and connections with electronic-vibrational entanglement and electronic coherence

Vatasescu

2018

Phys. Rev. A

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“…Applications of the coherence quantifiers to the characterization of the excitation energy transfer are still limited [161,162,163]. In order to compute these quantifiers, one needs to derive the system stateρ.…”

Section: General Coherence Quantifiersmentioning

confidence: 99%

Quantum modeling of ultrafast photoinduced charge separation

Rozzi

Troiani

Tavernelli

2017

J. Phys.: Condens. Matter

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Phenomena involving electron transfer are ubiquitous in nature, photosynthesis and enzymes or protein activity being prominent examples. Their deep understanding thus represents a mandatory scientific goal. Moreover, controlling the separation of photogenerated charges is a crucial prerequisite in many applicative contexts, including quantum electronics, photo-electrochemical water splitting, photocatalytic dye degradation, and energy conversion. In particular, photoinduced charge separation is the pivotal step driving the storage of sun light into electrical or chemical energy. If properly mastered, these processes may also allow us to achieve a better command of information storage at the nanoscale, as required for the development of molecular electronics, optical switching, or quantum technologies, amongst others.In this Topical review we survey recent progress in the understanding of ultrafast charge separation from photoexcited states. We report the state-of-the-art of the observation and theoretical description of charge separation phenomena in the ultrafast regime mainly focusing on molecularand nano-sized solar energy conversion systems. In particular, we examine different proposed mechanisms driving ultrafast charge dynamics, with particular regard to the role of quantum coherence and electron-nuclear coupling, and link experimental observations to theoretical approaches based either on model Hamiltonians or on first principles simulations.

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Experimental Progress on Quantum Coherence: Detection, Quantification, and Manipulation

Streltsov

Regula

et al. 2021

Adv Quantum Tech

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Quantum coherence is a fundamental property of quantum systems, separating quantum from classical physics. Recently, there has been significant interest in the characterization of quantum coherence as a resource, investigating how coherence can be extracted and used for quantum technological applications. In this work, the progress of this research is reviewed, focusing in particular on recent experimental efforts. After a brief review of the underlying theory, the main platforms for realizing the experiments are discussed: linear optics, nuclear magnetic resonance, and superconducting systems. Experimental detection and quantification of coherence, experimental state conversion and coherence distillation, and experiments investigating the dynamics of quantum coherence are then considered. Experiments exploring the connections between coherence and uncertainty relations, path information, and coherence of operations and measurements are also reviewed. Experimental efforts on multipartite and multilevel coherence are also discussed.

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Erratum: Measures of electronic-vibrational entanglement and quantum coherence in a molecular system [Phys. Rev. A92, 042323 (2015)]

Cited by 6 publications

References 0 publications

Non-Markovian dynamics of the electronic subsystem in a laser-driven molecule: Characterization and connections with electronic-vibrational entanglement and electronic coherence

Non-Markovian dynamics of the electronic subsystem in a laser-driven molecule: Characterization and connections with electronic-vibrational entanglement and electronic coherence

Quantum modeling of ultrafast photoinduced charge separation

Experimental Progress on Quantum Coherence: Detection, Quantification, and Manipulation

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